Apparatus for weaving loop pile fabrics



O. J. PARK ET AL APPARATUS FOR WEAVING LOOP PILE FABRICS Filed Marcfi20, 1956 2 Sheets- 1 HIE: I

INVENTQRS .BA lL u. com

ATTORNEY July 28, 1959 o. J. PARK ET AL APPARATUS FOR WEAVING LOOP PILEFABRICS Filed March 20, 1956 2 Sheets-Sheet 2 INVENTQRS 1 ORRIN J. PARK8| BASIL u, COTNER ATTORNEY iii! APPARATUS FOR WEAVING LOOP PILE FABRICSOrrin J. Park and Basil U. Cotner, Bloomsburg, Pa., as-

signors to The Magee Carpet Company, Bloomshnrg, Pa., a corporation ofPennsylvania Application March 20, 1956, Serial No. 572,657

10 Claims. (Cl. 139-46) This invention relates to apparatus for weavinga loop pile fabric with longitudinal gauge wires.

It is an object of the invention to provide a mechanism incorporated inaloom having a series of longitudinal gauge wires for moving the pileyarns back and forth across the gauge wires and down into and out of theground warps whereby the pile yarns are looped over the gauged wires toform rows of pile loops.

A further object of the invention resides in providing a pile weavingmechanism having a series of pile carrying needles or arms mounted abovethe gauge wires of a loom to swing downwardly and upwardly between thegauge wires with means for shifting the needles laterally to carry thepile yarns back and forth across the gauge wires to form pile loops.

Another object of the invention resides in providing mechanism of theabove-mentioned character which is simple and compact in construction,reliable and efiicient in operation and which may be readilyincorporated in a conventional loom.

Other objects and advantages of the invention will be apparent duringthe course of the following description.

In the accompanying drawings forming a part of this specification and inwhich like numerals are employed to designate like parts throughout thesame,

Fig. l is a vertical sectional view of the pile weaving mechanism,

Fig. 2 is a fragmentary top plan View of the mechanism,

Fig. 3 is a fragmentary perspective view showing more clearly the mannerof mounting the pile carrying arms in the supporting bar, and,

Fig. 4 is an elevational sectional view through a section of the fabric.

Referring to the drawings wherein for the purpose of illustration apreferred example of the invention is shown the numerals 5 and 6indicate the ground warps of the fabric being woven which are threadedrespectively through the eyes of the heddles 7 and 8 Which are operatedby suitable mechanism for shedding the said warps so that they may beinterwoven with the weft threads 9 inserted by the usual needle 10.

Disposed in a plane above the ground warps of the woven fabric are aseries of fixed gauge wires 11 extending in a direction warpwise of thefabric and in spaced parallel relation. The gauge wires are supported bya cross bar 12 attached to the lower edge of a slide rail 13 and areremovably secured in place by a clamping plate 14 and set screws 15. Thegauge wires extend forward from the loom through the dents of the reed16 and at their free ends are of a height corresponding to the height ofthe pile loops to be formed. The loop forming portion 11 of the gaugewires at its inner end is formed with a shoulder 17 which prevents theloops from sliding back on the gauge wires.

The slide rail 13 extends transversely of the loom forward of theheddles and is attached to the loom frame.

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A reciprocating slide bar 18 is slidably mounted in a groove 19 formedin the front face of the slide rail being held in place by removableretainer bars 20 and 21 attached to the slide rail by the bolts 22 and23.

A rotatable shaft 24 is mounted in bearing lugs 25 attached to the slidebar 18 by bolts 18 and attached to one end of said shaft is a bell crank26 connected with suitable timing mechanism for imparting an oscillatingmovement to said shaft. A series of hangers 27 are keyed on the shaft 24at spaced apart intervals by keys 29, the lower ends 28 of said hangersbeing of angular shape to receive the needle supporting bars 29 and 34mounted in superposed relation. The top bar 29 is rigidly secured to thehangers by bolts 31 and the lower bar 30 is attached to the hangers bybolts 32. The rear edge of lower bar 30 is provided with a series ofspaced slots 30' to receive the upper ends of needle arms 33 which areremovably retained in the slots by a clamping bar 34 attached to therear edge of upper bar 29 by bolts 35. The inner face of the clampingbar 34 is provided with a projecting rib 36 adapted to engage in notches3'7 formed-in the rear edge of the needle arms. Upward movement of theneedle arms is limited by the top bar 29. The pile yarns 37 leading froma source of supply such as a creel are trained over a guide roll 36'above the needle arms and are threaded through the eyes 33 in the lowerends of the needle arms 33. Upon oscillation of the shaft 24 the needlearms swing down and up between the gauge wires to carry the pile yarndown into and out of the ground warps in synchronism with the movementsof the heddles and weft needle during the Weaving of the fabric.

The slide bar 13 is reciprocated by a cam wheel 39 mounted on a shaft 40which engages one end of the slide bar which has its opposite end underthe pressure of a coil spring 41. Reciprocation of the slide bar 18,when the needle arms are in raised position, moves the needle barsacross the gauge wires and the movement is timed so that the needle armsswing down on one side of the gauge wires and then on the other side soas to carry the pile yarns to and fro in a weftwise direction across thegauge wires to form pile loops 42.

In operation, the heddles 7 and 8 are operated to raise and lower theground warps 5 and 6 to form a shed below the level of the gauge wires11. Then the needle arms 33 carrying the pile yarns 37' are swungdownwardly between the gauge wires by rotation of shaft 24 until theneedle arms are back of the path of movement of the weft needle 10whereupon a pair of weft threads are inserted in the shed. Afterinsertion of the weft threads the needle arms are swung upwardly abovethe gauge wires while the reed 16 moves forwardly to beat up the weftinto the fabric. The slide bar 18 is then reciprocated to move theneedle arms weftwise of the fabric to carry the pile yarns across thegauge wires and then the needle arms are swung downwardly on theopposite sides of the gauge wires to carry the pile yarns down into theground warps to be tied into the ground by insertion of the next shot ofweft threads after the position of the ground warps have been shifted byoperation of the heddles to form the next shed. Thus, it is seen thecarrying of the pile yarns to and fro across the gauge wires forms a rowof pile loops corresponding in height to the height of the loop formingportion of the gauge wires. As the fabric moves forward in the usualmanner the loops move off the ends of the gauge wires and the resultingfabric will have rows of pile loops with every other loop in a warpwiserow being twisted, as shown in Fig. 4. The alternate twisted loopsresults from the to and fro movement of the twisted yarn and thetendency of twisted yarn to resist movement in a direction reverse tothe direction of the original twist.

Having thus described our invention, we claim:

1. A loom attachment for weaving pile fabrics comprising in combinationwith a loom, a series of gauge wires mounted onthe loom and extendingparallelto the warps a reciprocating bar mounted above said gauge wiresfor movement transversely of said wires, a shaft rotatably mounted onsaid bar in parallel relation thereto, a series of pile carrying needlesextending from said shaft, and means for oscillating said shaft to swingsaid needles into and out-of the warp.

,2. A loom attachment for weaving pile fabrics as described in claim 1including means for removably mounting said pile carrying needles onsaid shaft.

3. A loom attachment for weaving pile fabrics comprising in combinationwith a loom, a series of gauge Wires mounted on the loom and extendingparallel to the warps, a reciprocating bar mounted above said gaugewires for movement transversely of said wires, means for reciprocatingsaid bar, a shaft rotatably mounted on said bar in parallel relationthereto and a series of pile carrying arms carried by said shaft forswinging movement to carry the pile yarn into and out-of the warps.

4. A loom attachment for weaving pile fabrics comprising in combinationwith a loom, a series of gauge wires mounted on the loom and extendingparallel to the warps, a reciprocating slide bar mounted above saidgauge wires for movement transversely of said wires, a rotatable shaftextending longitudinally of said bar and mounted thereon, hangers fixedon said shaft, a supporting bar carried by said hangers, a series ofpile carrying arms mounted in said supporting bar, means for oscillatingsaid shaft to vertically move said arms between said gauge wires tocarry the pile yarn into and out-of the warps and means forreciprocating said slide bar.

5. A loom attachment for weaving pile fabrics comprising in combinationwith a loom, a slide rail mounted on the loom above and transversely ofthe warps, a series of gauge wires attached to the lower edge of saidrail and extending parallelto the warps, a slide bar mounted in saidslide rail, means for reciprocating said slide bar, a rotatable shaftextending longitudinally of said slide bar and mounted thereon, hangersfixed on said shaft, a supporting bar carried by said hangers, a seriesof pile carrying arms mounted in said supporting bar and means foroscillating said shaft to swing said arms between said warps.

6. A loom attachment for weaving pile fabrics comprising in combinationwith a loom, a series of gauge wires mounted on the loom and extendingparallel to the warps, a rotatable shaft mounted above and extendingacross said gauge wires, a slide bar supporting said shaft movabletransversely of said gauge Wires, means for reciprocating said slidebar, hangers fixed on said shaft, a supporting bar carried by saidhangers, a scrim of pile carrying arms mounted in said supporting barand means for oscillating said shaft to vertically move said armsbetween said gauge wires to carry the pile yarn into and out-of thewarps.

7. A loom attachment for weaving pile fabrics comprising in combinationwith a loom, a slide rail mounted on the loom above and transversely ofthe warps, a series of gauge wires attached to the lower edge of saidrail and extending therefrom in the direction of the warps, a series ofpile carrying needles mounted on said slide rail for movement in aweftwise direction across said gauge wires, said needles being mountedto swing into and outof the warps.

8. A loom attachment for Weaving pile fabrics as described in claim 7including means for reciprocating said needles in a weftwise direction.

9. A loom attachment for weaving pile fabrics as described in claim 7including means for swinging said needles.

10. A loom attachment for weaving pile fabrics as described in claim 7including means for reciprocating said needles in a Weftwise directionand means for swinging said needles.

References Cited in the file of this patent UNITED STATES PATENTS608,226 Sargent et al. Aug. 2, 1898 791,678 Dustin June 6, 19052,353,968 Pedrazzo July 18, 1944 2,437,378 Clark Mar. 9, 1948 FOREIGNPATENTS 407,364 Great Britain Mar. 16, 1934

